1. Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
2. Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka 744, Nishi-ku, Fukuoka 819-0395, Japan
3. The Organic Photonics and Electronics Group, Department of Physics, Umea University, SE-90187 Umea, Sweden
4. Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium